Norway has commemorated one year since 77 people were killed and 242 hurt in gun and bomb attacks in Oslo and on the island of Utoeya.

PM Jens Stoltenberg laid a wreath in Oslo before travelling to Utoeya, where he was joined by hundreds of people, including relatives of the dead.

Anders Behring Breivik, who has admitted carrying out the two attacks, remains on trial.

Most of the dead were young activists with the Labour Party who had been staying on Utoeya as part of a summer camp.